Aerator



FIG. 1 is a top, rear, and left side perspective view of an aerator showing my new design;

FIG. 2 is a bottom front and left side perspective view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is an enlarged top plan view thereof; and,

FIG. 7 is an enlarged bottom plan view thereof.

The broken line showing of a web address in FIGS. 2 and 5 is included for the purpose of illustration and forms no part of the claimed design. 

The ornamental design for an aerator, as shown and described. 